Cam-shaft unit



A. H. LEIPRT CAM SHAFT UNIT June 5, 1923. 1,457,707

Filedv June 5, 1919 To all whomrz'tonctg/ concern:

Patented June 5, 1923.

femme! Sirius AUGUST n. LEIPnRT, o r NnvwYonKpN.' i'rfgAssreNon To INTERNATIONAL .iyrotrortv COMPANY, or

NEWv Your; Ny Y.,

A cOnPonATION OF DET.AWA1 E .v

QAM-SHAFTy TiN-IT.' 1 j i' Application filed4 June' 5,

. Be it known thatl, AUGUST H.lllnrrnnr, a citizen ofthe United States, residingiin the1borough of Queens,fofthe, cityof New York, y*in* the Sta-tei of New? York, have invented certain new and vuseful AIm'provenfients effect of this lis, to subject these bearings to heat conducted by the supports from the walls of the engine. Further, this construction does not alord the greatest facility in the mounting and` demounting of the cam shafts andr does not permitv` the bearings thereof to be removed from the engine with the shaft as an integral unit. The obj ect of 'the present invention'is to provide a unitary mounting for the bearings of the two cam shafts, which is supported on the engine head and which prevents the direct conduction of heat to the bearings Afrom the engine walls and permits the removal of the cam withoutldisturbance of any of the associated parts of the engine. The invention `will be described in. greater detail in connection with the accompanying drawing, in lWhich--y Figure l is a view in plan of an engine provided with the improved cam shaft mounting, the cover plate being removed.

Figure 2 isa view in sectionthrough the engine and the cam shaft mounting showing the relation thereof to the cylinder head.

, Figure 3 is ya detail .viewin side elevation of the improved cam shaft mounting.

Figureis a view in transverse section through the cam shafts taken on the planeV indicated by the line 4 4 of Figure 1 and looking in the direction of the arrows.

Figure 5 is a view in transverse sectionl through the cam shaft mounting taken on the plane indicated by the line 5`5 of Figure l and looking in thedirection of the arrows. L

Figure 6 is a view in .transverse section taken through the improved mounting on` the plane indicated by the line 6-6of Figf '-view.

1919.A seiarNo. 302,056.

ure and looking in the direction? of.' the' RITOWS. f

prises a walled member a, in which arevsup'- ported the usual valves b, and a cover plate c which may be secured in'v place by wing nuts CZ, permittingl ready vaccess to vthe engine head., Onthe engine headV is v.supported the improved one-piecemounting ewhicheX- tends longitudinally-'1thereof; and is 1 provided with suitablebearings faQ-re? ande3 forV the cam shafts 7 and 9...' This mountingis integral throughout and maybesboltedito the engine head by means of bolts y' passing through any available portionof the engine head according to its configuration and 1 through the lugs e5 or bolt holes'formedl in the mounting. .Itis preferred to make the mountlng cylindrical throughout at the points where the kbearings e', e2 and `el are provided, while it is ysufficient to make the ymounting generally semi-circular in form at intermediate sections, as indicated clearly in Figure 6. By this constructionlightness l is secured andthe cam shafts with the valve stems N and .springs b2 are exposed to tor'receive the bolts don which the wing curing the cover plate c removably in posi# tion. On the ends of the cam shafts may `nuts al are secured for the purpose of :se-

be secured engaging spur gearsh, 41, and on one yof the shafts g maybe keyed a bevel j gear 7c for engagement with the driving' bevel pinion -Z secured onrashaft Z which `may `be rotated vfrom the vcrank shaft in a, manner wellknown. The other cam shaft fmay carry on its 'end a governor m by l means of which the speed of the engine may be controlled through suitable connections whichvconstitute no part of this invention.y

The-gears lo, h and i and the governor m, all

being supported on the cam shafts f and' gin ther manner described', become a part of the lunitary structure: which constitutes' the essential characteristic'of the improved construction, and will be removed with the cam shafts when theymo'unting eisdetached y' from the engine head.

.By the construction dent that the heat, transmitted to the bearings e,e2, e3 through the supporting standdesoribed, itis evi-` y n 55 'l I The engine .head shown in Figure2 com-v The' valve mounting maybe pro-'\.80. `vided with bolt holes e4 lat Asuitable points shafts with their bea-rings las a unit and ards e5 of the mounting is negligible since the mounting is carried on the engine head and has no direct connection With the cylinder Walls or casing. Accordingly, these bearings c, e2, @sare not subject to that eX- cessive heat Which has been found objectionable in common practise.

To secure the improved mounting in place, the 'cam shafts having been assembled therein, the cover plate o is removed from the engine head and the mounting fastened in place bymeans of the bolts j, the heads of which are freely accessible. When it is desired to remove the cam shafts o-r to expose the valve'stems and their springs Z22, the

reverse operation is effected, 'Without disturbing the engine heada. or any of the associated elements of the engine.

Aside from the advantages particularly pointed out herein it is evident that the construction is a very substantial improvement in manufacturing considerations over the ordinary means now employed for supporting cam shafts.

Changes in design and relation of elements may be made Without departing from the scope of the invention provided suc-h changes fall Within the terms of the appended claim.

I claim as my invention:

In combination With an engine head, tivo sets of valves and two actuating camshafts therefor, respectively, a driving gear carried on one cam shaft,'meshing gears carried on the cam shafts whereby rotation is imparted from the first named cam shaft to the other, a one-piece mounting carrying bearings 'for said shafts and open at its lower side to eX- pose the cams to the valve stems, means to secure the mounting removably to the engine head whereby it may be removed from the head with thecam shafts and gears Without disturbing the associated elements of thek engine and leaving the valves in place in the engine, and a separate cover plate removable independently of the mounting and completely encasing said mounting and valve stems.

This specification signed this June, A. D. 1919.

` AUGUST H. LEIPERT.

3rd day of 

